Free online courses in Biology

Discover free online courses for beginners, students, and curious learners who want to understand living systems at their own pace. Start with Introduction to Biology, continue with Biology Foundations, and examine Cell Biology. Build a clear foundation in cell structure, evolution, ecology, genetics, and other essential concepts through accessible lessons. All courses are free and include a certificate upon completion, supporting your learning journey.

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Text courses

Free online courses on Biology

Free online courses by subject

Free Ebook + Audiobooks! Learn by listening or reading!

Human Body Systems Explained: How Organs Work Together to Keep You Alive

Learn how human body systems work together to maintain homeostasis, with clear explanations of circulation, respiration, digestion, and more.

Understanding Mendelian Inheritance: How Traits Are Passed Down

Discover how Mendelian inheritance explains the transmission of traits from parents to offspring, forming the basis of modern genetics and trait prediction.

The Role of DNA and RNA in Genetic Information Flow

Learn how DNA and RNA manage genetic information flow, enabling protein synthesis and driving advances in medicine, forensics, and biotechnology.

Genetic Mutations: How Changes in DNA Shape Life

Explore genetic mutations—their types, causes, and effects—and learn how changes in DNA influence evolution, diversity, and genetic disorders.

An Introduction to Genetics: The Blueprint of Life

Discover the basics of genetics, from DNA and chromosomes to heredity and genetic variation, and explore its applications in medicine, agriculture, and forensics.

The Structure and Function of Organelles: An In-Depth Look at the Cell’s Machinery

Organelles are the cell’s machinery—each with a key role that enables life. Their structure and function reveal how cells work, grow, and stay alive.

Introduction to Cell Biology: Understanding the Building Blocks of Life

Cell biology reveals how cells function, grow, and interact—laying the foundation for advances in health, genetics, and biotechnology.

Cell Division: The Cycle of Life in Cell Biology

Cell division is key to growth, repair, and reproduction, ensuring genetic continuity and supporting health through regulated cellular processes.

What are people saying about free online courses of Biology

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Curtis Ratcliff jr

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can you get a job out of the certificate out of the world

CourseIntroductory Biology

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fatima jahan

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Amazing teaching style learned so much , would recommend it to other students your notes were great.

CourseBiology foundations

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Fatima Hussain

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fantastic test were fair without being easy

CourseBiology foundations

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Free Online Life Science Courses with Certification

Explore free online courses designed to develop knowledge of living organisms, cellular structures, heredity, evolution, physiology, ecology, and biological diversity. These learning opportunities combine educational terminology with accessible explanations, helping students build a strong scientific foundation. Every course is free, includes exercises for knowledge reinforcement, and offers free certification after completion.

Study essential biological concepts online

The course collection covers introductory and foundational principles as well as specialized subjects such as cell biology and genetics. Learners can study the scientific method, levels of biological organization, biomolecules, metabolism, cell division, DNA, gene expression, inheritance, natural selection, taxonomy, homeostasis, and interactions between organisms and ecosystems.

  • Biology provides broad learning materials for understanding organisms, biological processes, and life science principles.
  • Introduction to Biology presents fundamental concepts and scientific vocabulary for new learners.
  • Introductory Biology supports the systematic study of cells, organisms, heredity, and evolution.
  • Biology course offers lessons that reinforce core theories and biological mechanisms.
  • Biology foundations focuses on the concepts required for continued study in the life sciences.
  • Biology Learning encourages structured review and the practical application of scientific knowledge.
  • Cell Biology examines organelles, membranes, cellular transport, energy conversion, mitosis, and meiosis.
  • Genetics Basics introduces genes, chromosomes, DNA, inheritance patterns, variation, and molecular genetics.

Flexible learning with exercises

Study at your own pace and revisit lessons whenever additional review is needed. Course exercises help assess comprehension, recall important terminology, and apply concepts to questions involving cellular function, genetic transmission, classification, adaptation, and ecological relationships. This format is useful for school revision, examination preparation, professional development, or independent scientific learning.

Free courses and free certification

There are no course fees, and learners can obtain free certification upon completing the required learning activities. The courses are suitable for beginners, students, educators, and anyone interested in health sciences, biotechnology, environmental science, medicine, agriculture, or related academic disciplines.

Access the courses in the Cursa app

To access these free courses, lessons, exercises, and free certification, users must install the Cursa app. Android users can install it through Google Play at Download for Android. iPhone users can install it through the App Store at Download for iOS / iPhone. Begin learning online and strengthen your understanding of the processes that define living systems.

What can I learn in an online biology course?

You can learn core topics such as cells, genetics, evolution, ecology, human biology, and the diversity of living organisms.

Is biology suitable for beginners?

Yes. Introductory biology courses explain essential concepts and vocabulary without requiring prior biology knowledge.

What is covered in a cell biology course?

Cell biology covers cell structure, organelles, cell membranes, metabolism, cell division, and cellular communication.

What will I learn in genetics basics?

You will learn about DNA, genes, chromosomes, inheritance, mutations, gene expression, and basic genetic patterns.

Does a biology course include microbiology?

Many biology courses introduce microbiology, including bacteria, archaea, viruses, and their roles in health and ecosystems.

Can I study plant biology online?

Yes. Plant biology courses can cover photosynthesis, transport systems, plant cells, growth, reproduction, and adaptation.

Can online biology courses help with exam preparation?

Yes. Biology exam-prep courses review key concepts, terminology, and commonly tested areas such as cells, genetics, and ecology.

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Complete any course and issue your certificate via the app — at no cost.

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